/Engine/Source/Runtime/AssetRegistry/Public/AssetRegistry/IAssetRegistry.h
Gets an ETA or percentage complete for an asset that is still in the process of being installed.
float GetAssetAvailabilityProgress ( const [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) & AssetData, [EAssetAvailabilityProgressReportingType::Type](API\Runtime\AssetRegistry\AssetRegistry\EAssetAvailabili-) ReportType ) const